相关疑难解决方法(0)

我试图序列化一个类,我有一个位图变量.这是有点工作的代码....我需要帮助找出仍然存在的问题.....

private Bitmap myVideoScreenshotBm;

private void writeObject(ObjectOutputStream out) throws IOException{

    out.writeInt(myVideoScreenshotBm.getRowBytes());
    out.writeInt(myVideoScreenshotBm.getHeight());
    out.writeInt(myVideoScreenshotBm.getWidth());

    int bmSize = myVideoScreenshotBm.getHeight() * myVideoScreenshotBm.getRowBytes();
    ByteBuffer dst= ByteBuffer.allocate(bmSize);

    myVideoScreenshotBm.copyPixelsToBuffer(dst);

    byte[] bytesar=new byte[bmSize];
    dst.position(0);
    dst.get(bytesar);

    out.write(bytesar);


}

private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException{

    int nbRowBytes=in.readInt();
    int height=in.readInt();
    int width=in.readInt();
    //
    int bmSize = nbRowBytes * height;
    byte[] toread= new byte[bmSize];

    in.read(toread, 0, toread.length);
    ByteBuffer dst= ByteBuffer.allocate(bmSize);
    dst.put(toread);
    dst.position(0);
    myVideoScreenshotBm=Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
    myVideoScreenshotBm.copyPixelsFromBuffer(dst);

}

我没有得到错误,但我得到的位图是错的...另外,我不知道如何知道哪个Bitmap.Config标志是合适的......怎么知道？

任何帮助？

奇怪的情况 - 下面是代码:

ArrayList<String[]> listArr = new ArrayList<>();
Object[] obj = new Object[]{"str", listArr};

String str = (String) obj[0];//OK
ArrayList<String[]> list = (ArrayList<String[]>) obj[1];//warning: [unchecked] unchecked cast

构建项目时(-Xlint:unchecked在项目属性中使用编译器选项),我收到一个警告:

警告:[unchecked] unchecked cast
ArrayList list =(ArrayList)obj [1];
required:
找到ArrayList :Object

但是以相同的方式构建String是可以的.这里有什么问题？